Syed, Tareq; Schierwater, Bernd (2002). "The evolution of the placozoa: A new morphological model". Senckenbergiana Lethaea (dalam bahasa Inggris). 82 (1): 315–324. doi:10.1007/bf03043791. ISSN0037-2110. S2CID16870420.
Wallberg, Andreas; Thollesson, Mikael; Farris, James S.; Jondelius, Ulf (2004). "The phylogenetic position of the comb jellies (Ctenophora) and the importance of taxonomic sampling". Cladistics (dalam bahasa Inggris). 20 (6): 558–578. doi:10.1111/j.1096-0031.2004.00041.x. ISSN0748-3007. S2CID86185156.
Syed, Tareq; Schierwater, Bernd (2002). "The evolution of the placozoa: A new morphological model". Senckenbergiana Lethaea (dalam bahasa Inggris). 82 (1): 315–324. doi:10.1007/bf03043791. ISSN0037-2110. S2CID16870420.
Wallberg, Andreas; Thollesson, Mikael; Farris, James S.; Jondelius, Ulf (2004). "The phylogenetic position of the comb jellies (Ctenophora) and the importance of taxonomic sampling". Cladistics (dalam bahasa Inggris). 20 (6): 558–578. doi:10.1111/j.1096-0031.2004.00041.x. ISSN0748-3007. S2CID86185156.
Syed, Tareq; Schierwater, Bernd (2002). "The evolution of the placozoa: A new morphological model". Senckenbergiana Lethaea (dalam bahasa Inggris). 82 (1): 315–324. doi:10.1007/bf03043791. ISSN0037-2110. S2CID16870420.
Wallberg, Andreas; Thollesson, Mikael; Farris, James S.; Jondelius, Ulf (2004). "The phylogenetic position of the comb jellies (Ctenophora) and the importance of taxonomic sampling". Cladistics (dalam bahasa Inggris). 20 (6): 558–578. doi:10.1111/j.1096-0031.2004.00041.x. ISSN0748-3007. S2CID86185156.